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| author | Vasily Gorbik <gor@linux.ibm.com> | 2018-04-11 12:56:55 +0300 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2018-10-09 12:21:08 +0300 |
| commit | 6966d604e2ec4ecf5691aea953538f63597a250d (patch) | |
| tree | bb97b41e8ee7ead33cb952f690820f13d4dd8ab6 /drivers/s390/char | |
| parent | 17aacfbfa1ae386d3e54d12a13b88b7981e04896 (diff) | |
| download | linux-6966d604e2ec4ecf5691aea953538f63597a250d.tar.xz | |
s390/mem_detect: move tprot loop to early boot phase
Move memory detection to early boot phase. To store online memory
regions "struct mem_detect_info" has been introduced together with
for_each_mem_detect_block iterator. mem_detect_info is later converted
to memblock.
Also introduces sclp_early_get_meminfo function to get maximum physical
memory and maximum increment number.
Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Reviewed-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/s390/char')
| -rw-r--r-- | drivers/s390/char/sclp_early_core.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/s390/char/sclp_early_core.c b/drivers/s390/char/sclp_early_core.c index bbea2154a807..4f04ba689771 100644 --- a/drivers/s390/char/sclp_early_core.c +++ b/drivers/s390/char/sclp_early_core.c @@ -270,3 +270,20 @@ int __init sclp_early_get_info(struct read_info_sccb *info) *info = sclp_info_sccb; return 0; } + +int __init sclp_early_get_meminfo(unsigned long *mem, unsigned long *rzm) +{ + unsigned long rnmax; + unsigned long rnsize; + struct read_info_sccb *sccb = &sclp_info_sccb; + + if (!sclp_info_sccb_valid) + return -EIO; + + rnmax = sccb->rnmax ? sccb->rnmax : sccb->rnmax2; + rnsize = sccb->rnsize ? sccb->rnsize : sccb->rnsize2; + rnsize <<= 20; + *mem = rnsize * rnmax; + *rzm = rnsize; + return 0; +} |